Abstract HCCI is considered a very promising solution to reduce engine pollutant
emissions, however so far only experimental prototypes have been
inspired by this concept. HCCI combustion of both DME and
n-heptane fuels display a distinct two-stage ignition reaction
with the first stage taking place at fairly low temperatures and
the second stage taking place at high temperatures. The second
stage is responsible for the main stage of the heat release
process. In this study, a single-zone, zero-dimensional,
thermo-kinetic combustion model has been developed. MATLAB
software is used to predict engine performance characteristics of
HCCI engines using two types of diesel fuel: Dimethyl ether and
n-heptane. The effects of intake temperature and pressure, fuel
loading and addition of EGR gases on auto-ignition
characteristics, optimum combustion phasing, and performance of
the HCCI engines are considered in this study.